Mine was broke too. I installed a $99 speedo head, a new clear lense and I polished the chrome trim. It looks almost new now with a little clean up.
That Tack-Force is a nice set up though. If you really have to have a tach, and like the stock look that is the way to go.
1959 Apache 3200, Standard Cab, Big Window, Fleetside, 235/3spd, Original Paint
1964 C20 Standard Cab, Fleetside, 283/Power Glide, A/C, Pwr Steering, Pwr Brakes, NoSpin | 
